工艺参数对VARTM中树脂充模流动的影响研究

摘要

With visual resin flow experiment,the effects of the process parameters such as high permeability medium,resin viscosity,the injection way of resin and vacuum pressure,on resin molding process in vacuum assisted resin transfer molding (VARTM) were studied.The results show that the high permeability medium play a dominant role in the speed of resin filling in VARTM process;the filling time increases with the increase of resin viscosity;resin filling speed and resin flow pattern are greatly affected by the injection way of resin,when the filling time of resin point type is three times for line injection and nine times for surrounded injection;the filling time increases firstly and then decreases with the vacuum pressure gradually increases.%采用可视化树脂流动实验装置，研究了高渗透导流介质、树脂黏度、树脂注射方式和真空压力等工艺参数对真空辅助树脂传递模塑(VARTM)工艺中树脂充模流动过程的影响。结果表明，VARTM工艺中高渗透导流介质对树脂充模的速度起着主导作用；随着树脂黏度的增大，完成充模所需时间呈现指数增加趋势；树脂注射方式对充模速度和充模流动模式影响大，树脂采用边界点型注射时充模所需时间是边界线型注射的3倍，是四周注射的9倍；随着真空压力的增大，完成充模所需的时间呈现先变大后变小的趋势。